I administrate a CentOS Linux release 7.5.1804 (Core) system running Docker 17.05.0-ce. This environment is using device mapper as the storage driver. When it was first setup and configured around a year ago everything worked as expected, but at some point the system had an unexpected reboot.

Here’s the issue: when attempting to startup the Docker Engine via systemd, I get the following:

(Note: I did a grep to replace the system hostname with {system} in the above log snippets).

Is there some way to fix this without rebuilding the system? This system is used as an environment to build Docker containers, and it currently has 1Tb of storage, so I’d prefer to fix whatever issues the Docker Engine is having at startup when run under systemd rather than having to rebuild everything. My current work-around is to just run the Docker Engine directly inside screen, but that’s not a very robust work-around.